Malicious PDF — malware analysis report

Static analysis result for SHA-256 7956d5ccc8d3c1f6…

MALICIOUS

PDF

96.9 KB Created: 2021-05-18 04:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 469cc3e84c4731b1a0b6df3ab78bce2d SHA-1: 78632a077bb36db03cf2be159539e283d8b9bea8 SHA-256: 7956d5ccc8d3c1f62f976f01f19f6b3af8e44e315dfc6d7f33c8e211e6ece6e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for phishing or redirecting users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs, such as https://jacksth.ru/strik, are likely part of a link farm or phishing campaign designed to trick users into clicking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jacksth.ru/strik?utm_term=market+leader+pre+intermediate+progress+test+1+answers PDF link annotation
    • http://gokutasajegeraj.22web.org/19496012123.pdfIn PDF document text
    • https://jawizadobem.weebly.com/uploads/1/3/4/7/134773472/1773434.pdfIn PDF document text
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/bivitogiwutu_vabewubixowison_jumepipole.pdfIn PDF document text
    • http://sabinemusewak.22web.org/91799148957.pdfIn PDF document text
    • http://maporirunigis.22web.org/42573959986.pdfIn PDF document text
    • https://dewubolisevibe.weebly.com/uploads/1/3/4/3/134318954/vefudaju_mobutomenotagas_kagifupavideg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fotopozivami.epizy.com/characteristics_of_management_accounting.pdfIn PDF document text
    • http://wulitebajanuba.rf.gd/31763911480.pdfIn PDF document text
    • http://gebutetivifupa.epizy.com/xawogateferuvomepezig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31a6233-0e19-4514-8a1d-03af5ba27519/63821572913.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/mount_and_blade_warband_native_companion_guide.pdfIn PDF document text
    • http://fipuzugajan.epizy.com/doxewefumogezobir.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/application_x-_www-_form-_urlencoded_post_json.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/training_calendar_template_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/515ed04b-4e2e-49a4-b7c9-fd87f1e51c7f/zexoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/3d_video_editor_software.pdfIn PDF document text
    • http://xojapenekoxij.rf.gd/desidratao_de_alcoois.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/ecological_niche_meaning.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001159e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159E 5412 bytes
SHA-256: f14ad50a7daf896622ec83026c34d231deaef78b527961570349d0721306b5a4
font_01_sfnt_off0001286b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286B 5280 bytes
SHA-256: 8ab4a237f11e0e9cbb08a34e1f0d921bc4a6eb7b4225ad1b83b3abcf6c02e5f2
font_02_sfnt_off00013a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A64 14616 bytes
SHA-256: b89684f966469b6649821c8f01a7118b389f9853f80e87fb97a2241b932ca34c
font_03_sfnt_off00016767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16767 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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